Improvement in zinc-furnaces



UNITED STATES PATENT OFFICE.

ERNST H. RICHTER AND FRIEDRICH G. RICHTER, CF TAUNTON, MASS.

IMPROVEMENT IN ZINC-FURNACES.

Specification forming part Cf Letters Patent N0. 145,450, dated December 9 1873; application filed August 21, 1873.

T0 all whom it mag concern Be it known that we, ERNST H. RICHTER- and FRIEDRICH G. RICHTER, Cf Taunton, in tl1e connty Cf Bristol and State Cf Massaehnsetus, have invented an Improved Zinc-Furnaee, Cf whieh the following is a specification:

Figure 1 is a side elevation, partly in seetion, Cf Cur improwd zincfnrnace. Fig. 2 is an en l elevation, partly in section, Cf the same; and Fig. 3 a horizontal section thereof throngl1 tl1e passages above the retort-chamber.

Similar letters Cf reference inclicate C01responding parts in all the figures.

The object Cf (hie invention is t0 redce the expense Cf zinc-furnaces, and at the same t-ime t0 increase tl1e draft in the Same and facilitate the rapiclity Cf thorough operation tl1e1ein. The invention cCnsists, prineipally, in forming Oll top Cf the fnrnace, ab0ve the ehamber (3011- taining the retorts, and in place Cf the side staeks usually employed, horizontal, partly in- Clinecl, draft-passages, whieh lead to the Center stack, and whieh constit-ute fnllyas reliable C011- duits f0r the escaping gases as the ordinary side stacks, being however eonsiderably cheaper in construotion than tl1e same. 0111 invention also consists in forming inelined clraftpassages in tl1e longitudinal partition Cf the retort ehamber, el1iefly f0r the purpose Cf taking eurrents Cf fresh air from eaoh end 130 the Center stack, thereby increasing the drafu and hastening the process Cf preparing the zinc.

In the accompanying drawing, the letter A represents the lower part;- Cf a zinc-furnace, constructed with a heating apparatns ancl wit-h receptaeles f0r the retorts, snbstantially in the customary manner, such heating apparatus and retort-receptaeles 11013 being shown in the drawing, because well known. B is the lower art Cf the central smoke-stack nsually formed 0n zinc-furnaces. This smoke-stack is also Cf tl1e eustomary construction, provided with openings for the reeeption Cf the gases, and

With an upright shaft for their escape. C C are side passages 011 top Cf A fCr eonducting the gases f10n1 the ends Cf the furnaee 1:0 the central staek B. These assages or pipes C are arrangecl f0nr in nnmber, one fron1 eaeh corner Cf the furnace leading t0 tl1e smoke- Stack B. Their positions a1e fully indieated in Fig. 3.

These passages C are easily bnilt upon tl1e furnace A without adding materially to the cos Cf the same, and serve better than fl1e separate staek heretofore used f0r condnoting the snperfluous gases away from the furnaee.

Tl1e lower part, A, Cf the furnace is nsually made in tWC compartments, whioh are divided longitudinally by a central partition. In tlxis partition we form two inclined a-ir-passages, a a, Wl1ich are indicated by dotted lines in Fig'. 1, and also in Figs. 2 and 3, extending from the Center Cf the top Cf t-he fnrnace A Cntwardly toward the ende Cf the Same. 'llu0ugh these passages a, by snction creat-ed tlnough the draft, fresh air is condtwted int0 the stack in constant currenfs.

Ve claim as Cnr invention, and desire tC secure by Letters Patent- 1. The zine furnace carrying tl1e eentr-al stack B 011 tCp Cf and in direut eommunication Witl1 central portion Cf theretort-ehamber, and

with the passages C C that 'extend 130 the fonr corners Cf the fnrnaee, so that the Stack will ab onee draw the gases fr0m all arts Cf the furnaee, as set forth.

2. A zinc-fnrnace provided with inelined airpassages a a in the central partition, when said air-passages are 1nade t0 extend from tl1e ende Cf the furnace t0 the central stack B, substantially as speeified.

ERNST H. RICHTER. FRIEDRICH GUSTAV RICHTER.

Witnesses:

G. E. WILLIAMS, LEML. T. TALBOT. 

